Building Clay Muscles - S & F

Pectoralis Major

Origin: Clavicle, sternum, costal cartilages 1-6

Insertion: (lateral lip of) intertubercular groove

Deltoid

Origin: lateral 1/3 of clavicle; acromion; spine of scapula

Insertion: deltoid tuberosity

Innervation: Axillary n.

Supraspinatus

Origin: Supraspinous fossa of scapula

Insertion: Greater tubercle of humerus

Infraspinatus

Origin: Infraspinous fossa of scapula

Insertion: Greater tubercle of humerus

Coracobrachialis

Origin: Coracoid process of scapula Insertion: Medial surface of humerus

Innervation: Musculocutaneous

Biceps Brachii

Origin: Long head - supraglenoid tubercle; Short head - coracoid process

Insertion: Radial tuberosity & bicipital aponeurosis

Innervation: Musculocutaneous n.

Brachialis

Origin: Distal anterior humerus

Insertion: Coronoid process of ulna

Innervation: Musculocutaneous n.

Brachioradialis

Origin: Lateral supracondylar ridge of humerus

Insertion: Styloid process of radius

Innervation: Radial n.

Triceps Brachii

Origin: Long head - infraglenoid tubercle; Lat. head - prox. post. humerus; Med. head - mid post. humerus

Insertion: Olecranon process

Innervation: Radial n.

Teres Major

Origin: Inferior angle of scapula

Insertion: (medial lip of) intertubercular groove

Sternocleidomastoid (SCM)

Origin: Manubrium; medial clavicle

Insertion: Mastoid process

Innervation: Spinal accessory n.

Serratus Anterior

Origin: Lateral surfaces of ribs 1-8

Insertion: Medial border of scapula (anterior surface)

Innervation: Long thoracic n.

Rectus abdominis

Origin: pubic crest & symphysis

Insertion: Xiphoid process; costal cartilages 5-7

Trapezius

Origin: Medial 1/3 of superior nuchal line; spinous process C7-T12

Insertion: Lateral 1/3 of clavicle; acromion; spine of scapula

Innervation: Spinal accessory n.

Latissimus Dorsi

Origin: Spinous processes T7-L5; thoracolumbar fascia; iliac crest

Insertion: (floor of) intertubercular groove

Innervation: Thoracodorsal n.

Levator Scapulae

Origin: Trans. processes C1-C4

Insertion: Superior medial border of scapula & superior angle

Innervation: Dorsal scapular n.

Rhomboid minor

Origin: Spinous processes C7-T1

Insertion: Medial border of scapula (at root of spine)

Innervation: Dorsal scapular n.

Connects to intertubercular groove

Teres major, lat. dorsi, and pec. major

Sartorius

Origin: Anterior superior iliac spine (ASIS)

Insertion: Pes anserinus (medial tibial condyle)

Innervation: Femoral n.

Rectus femoris

Origin: Anterior inferior iliac spine (AIIS)

Insertion: Tibial tuberosity via patellar ligament

Innervation: Femoral n.

Vastus lateralis

Origin: Greater trochanter and linea aspera of femur

Insertion: Tibial tuberosity via patellar ligament

Innervation: Femoral n.

Vastus medialis

Origin: Linea aspera of femur

Insertion: Tibial tuberosity via patellar ligament

Innervation: Femoral n.

Gracilis

Origin: Inferior pubic ramus

Insertion: Pes anserinus (medial tibial condyle)

Innervation: Obturator n.

Iliacus

Origin: iliac fossa; ala of the sacrum

Insertion: lesser trochanter of the femur

Innervation: femoral n.

Psoas Major

Origin: bodies, discs, and transverse processes of T12-L5

Insertion: Lesser trochanter of the femur

Gluteus Maximus

Origin: posterior ilium; sacrum; coccyx

Insertion: prox post femur; IT band

Gluteus medius

Origin: lateral surface of ilium

Insertion: greater trochanter of femur

Biceps femoris

Origin: Long head - ischial tuberosity; Short head - linea aspera

Insertion: head of fibula

Innervation: tibial division of sciatic n.

Semitendinosus

Origin: ischial tuberosity

Insertion: Pes anserinus (medial tibial condyle)

Innervation: Tibial division of sciatic n.

Gastrocnemius

Origin: medial & lateral condyles of femur

Insertion: calcaneus via Achilles tendon

Innervation: tibial n.